The new look and flavors are the result of a two-year process during which the Diet Coke research and development team tested more than 30 new flavor combos, eventually settling on the four listed above. They also slimmed down the iconic 12-ounce can to give it a "more contemporary feel," according to a press release. Another distinguishing feature on the new cans is a fresh stripe of color from top to bottom, which Coca-Cola's VP of Global Design James Sommerville has dubbed the "High Line." “It visualizes how the Diet Coke brand, the innovation -- and the consumers who love Diet Coke -- are continually on the move, with confidence," he said, per the release.
Of course, the big question is why did Diet Coke decide it needed to change things up? Well, for one, sales have been down in recent years as younger folks have flocked to other calorie-free carbonated options like LaCroix. And as Coca-Cola North America's group director for Diet Coke, Rafael Acevedo, explained in an interview with Buzzfeed News, it had to appeal to a changing demographic.